but then again just add some backstory that the old mavor was just not really efficient on the battlefield because of all those damn shields..
so they went for more shots but smaller shells^^

still, you migh want to make the "building" arround bigger.
like a little controll center where all the avanced tech is housed, some uplink arrays and stuff u know.
just make it look massive!^^ (and I mean not only the gun itself)